Lyn Chitty,Professor of Genetics and Fetal Medicine at the UCL Great Ormond Street Institute of Child Health and Great Ormond Street NHS Foundation Trust, has published extensively on prenatal diagnosis and ultrasound screening of fetal abnormalities, and was responsible for creating the fetal size standards now in use throughout the UK and beyond. Recently her main research interest has been around the use of circulating cell free DNA. She led an NIHR programme (‘Rapid Accurate Prenatal non-Invasive Diagnosis (RAPID) which resulted in NHS implementation of NIPD for rare diseases, and provided the evidence to support routine implementation into NHS maternity care of NIPT for aneuploidy. She continues to work on the implementation of new molecular techniques to improve prenatal diagnosis through the investigation of whole exome and genome sequencing and extended development of NIPD. She is an editor of the journal Prenatal Diagnosis. In 2014 she was appointed an NIHR Senior Investigator. In addition to her own research, she is Clinical Director of the NIHR Clinical Research Network: North Thames, responsible for delivery of the NIHR portfolio of studies across all specialties, and Clinical Director for the North Thames NHS Genomic Medicine centre which is delivering around 25% of the genomes for the 100,000 Genomes Project. This national transformation programme will result in implementation of personalised medicine in the NHS, and has led to a broadening of her research interests which now includes developing methods to ensure informed consent for sequencing.